Home > VansAirForceForums

- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

Old 08-14-2017, 09:32 AM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 508
Default Page 29-03: Brass Elbows


On page 29-03 it has us fitting the Brass Elbows into U-01402 and then clocking them at 6.9deg.

To achieve the desired clocking the elbow is not what I would consider fully tightened. It's snug, just not "tight".

Going around another turn isn't possible, at least not without what I would consider an inappropriate amount of force.

Am I correct in assuming that the pipe thread sealant will keep it from leaking and this is normal?

Thanks for any advice!
#140376 RV-14A QB IO-390 Thunderbolt
Reserved: N196
Progress: Firewall Forward

Last edited by bkervaski : 08-14-2017 at 09:49 AM.
Reply With Quote
Old 08-14-2017, 09:36 AM
Vern's Avatar
Vern Vern is offline
Join Date: Jan 2005
Location: Peachtree City, Ga
Posts: 920
Default brass fitting

No, it will leak .

Just inspected a 7 in Alabama Saturday and it had a leaking fitting. I see it often.

Try swapping it out with another fitting. It may be better.

Vern Darley
RV-6A N680V / RV-10QB N353RV
Luscombe 8E
Hatz Biplane
Falcon RV Squadron
KFFC Hanger D-30
Peachtree City, Ga
770 310-7169
EAA Technical Counselor #5142
EAA Flight Advisor #486336
Reply With Quote
Old 08-14-2017, 09:48 AM
DaleB's Avatar
DaleB DaleB is online now
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 1,775

Vern's right, it will leak. I'm in the same boat on my completed 12. I have one that can't make another full turn, but where it has to be clocked isn't "farmer tight". It's got a very minor but annoying seep. I turned it until I was seriously afraid the master cylinder would crack, but it can't make that last quarter turn or so.

If someone knows a way to get an extra quarter or half turn out of one, I'm all ears... otherwise I could buy another one and hope for the best, but what if it's just as bad? Keep buying more 90 elbows in hopes of getting one that works? Now I'm understanding why I pulled 4-5 wraps of Teflon tape off that the builder had used on them (they still leaked).
Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
-=VAF=- 2017 dues paid
Reply With Quote
Old 08-14-2017, 11:36 AM
TS Flightlines TS Flightlines is offline
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 1,940

"possibility" of running an 1/8NPT tap in the hole and slightly expanding the threads. Definitely use sealer on NPT threads.

Tom Swearengen, TS Flightlines LLC
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
Reply With Quote
Old 08-14-2017, 12:06 PM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 508

Found a simple solution, I swapped and flipped the U-01402 parts and was able to get them nice and tight and clocked at about 7deg.
#140376 RV-14A QB IO-390 Thunderbolt
Reserved: N196
Progress: Firewall Forward
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 07:43 PM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.